-
-
![]()
-
-
Make your own BlueTooth RC Throwmeter
-
-
by Yannick Selles
-& Pierre Rondel
-
-
-
-
Introduction
-
-
The purpose of this article is to propose you to
-"build" your own Bluetooth throw-meter for a very reasonable cost. It
-doesn't require any soldering or cabling. You just need to have access to a 3D
-printer and that is all !
-
-
-
-
The original idea came to Pierre's mind after finding
-by chance on aliExpress an all-in-one 6 Axis Bluetooth Digital Angle
-Accelerometer Module.
-
-
-
-
Initially, he bought 2 exemplars of the board, then
-bought a 1s lipo, a micro switch, and designed the case and the clips. Later he
-discovered that the same component was existing with a case the battery, the
-switch, the charging plug, and a charging cable for 4 euros more. It saves a lots of soldering and cabling, so the final version we
-propose hereafter is based on this model.
-
-
-
-
The component
-
-
![]()
-
-
The component is the BWT61CL
-from Wit Motion, a Six axis Bluetooth attitude angle sensor with battery
-incorporated. It can by bought on aliexpress or amazon US and amazon EU and
-cost around 20 Euros, free shipping.
-
-
-
-
It is based on the JY61 sensor, has Bluetooth or
-serial connectivity, integrates a dynamic Kalman filter algorithm, an internal
-voltage stabilizing circuit module, voltage 3.3v~5v. The only drawback it has
-is that the Bluetooth BLE is only compatible with android. The battery has a 150mA capacity so last for a long operation
-time.
-
-
Where to buy
-
-
-
-
Characteristics
-
-
- - Voltage: 3.3V-5V
- - Current: <40mA
- - Size : 51.3mm x 36mm X 15mm
- - Weight : 16gr
- - Dimension: Accelerated speed -3d
- Angular speed -3d Magnetic field-3d Angle-3d
- - Air pressure 1d
- - Range : Accelerated speed -±16g
- Angular speed -±2000°/s Angle---±180°
- - Stability: Accelerated speed -0.01g
- Angular speed -0.05°/s
- - Attitude measurement stability: 0.05°
- - Output content: Time, Accelerated
- speed, Angular speed, Angel.
- - Output frequency：100Hz
- - Date interface: Serial TTL level
- Bate rate--115200(default and cant be changed)
- - Bluetooth transmission distance : >10m
- - Support for
- Android
- - Working time: 2 to 3 hours (full
- charge)
-
-
-
Documentation
-
-
http://wiki.wit-motion.com/english/lib/exe/fetch.php?media=bluetooth_inclinometer:bwt61cl:docs:bwt61cl_user_manual_v1.pdf
-
-
-
-
Building your RC
-Throw-meter
-
-
As I said in introduction, the work is limited to the
-3D printing of the clips that allow to fix the device on the trailing edge of
-the glider. It has been designed on DesignSpark (original file .rsdoc), and I'm providing the .rsdoc original file in
-addition to the STL file.
-
-
-
-
STL file is
-here
-
-
![]()
-
-
The clips is removable so the device, its clips and
-the charging cable can be carried/stored in the plastic box it was received in.
-
-
-
-
Just print the part, in PLA or PETG or ABS, 100% in
-fill for me. The dimension is optimised for F3x plane wings and tailplanes. To
-protect the surface of the control surface and avoid the clips to slide/shift,
-I added a piece of rubber (a small piece of bicycle inner tube) on the clips
-surfaces, with double side tape.
-
-
-
-
![]()
-
-
-
-
-
-
Print the sticker using the .pdf provided. Prior to
-apply it, don't forget to remove the other stiker. Protect the printed
-paper with transparent tape at the top, and double side tape on the other side,
-and position it on the top of the case, respecting the correct orientation
-(Charge, On/Off). This will give you the orientation when using pointing where
-is the hinge
-
-
-
-
The App
-
-
![]()
-
-
The Android App has been developped by Yannick. The
-.apk file can be downloaded from here: Android App .apk file
-
-
-
-
The App is divided in several screens, the start
-screen giving access to the top left menu, the "Sensor BT" screen to
-bind the App with the throwmeter, and finally the "Throw Meter"
-screen where everything happens once binded.
-
-
-
-
Using your RC
-Throw-meter
-
-
Charging the
-battery
-
-
Connect the cable provided to the balancer Plug. The
-red led is ON during the charge and switch off once charged
-
-
-
-
Switching on your
-Throwmeter
-
-
Move the sliding switch from right to left. The blue
-led is blinking which indicates that the device is waiting for the binding.
-
-
-
-
Binding your
-Android smartphone for the first time
-
-
On in the parameter/bluetooth menu and scan for new
-device. The RC throwmeter will show as HC-06. When asked, enter the code 1234.
-The throwmeter is now dinded, you can open the App.
-
-
-
-
Binding with the
-App
-
-
Select the menu on
-the top left, then open "Sensor BT" and select HC-06 or click on SCAN
-if the device doesn't appear. Once selected you can return on the start page,
-Open the menu on the top left and select "Throw meter"
-
-
-
-
Reset Angle
-
-
The device is
-supposed to do a calibration at startup. It is recommended to do it with the
-device installed on a horizontal surface. Once done, you can clip the
-device on the leading edge of control surface you want to measure. When
-your control surface is at its neutral position, proceed to a new
-"Reset Angle" in order for the device to know its spacial position
-and be ready to measure the angle.
-
-
-
-
Travel setup
-
-
Measure the chord
-of you control surface and click on the chord field at the top of the screen to
-enter the value. There is no unit so it can be mm or inches. Travel will be shown in the same unit.
-
-
-
-
![]()
-
-
Max UP and Max
-DOWN
-
-
This is a very useful feature that allow you to
-quickly measure the Max UP and DOWN travels of a control surface.
-
-
-
-
![]()
-
-
-
-
-
-
SET Max UP and Max
-DOWN
-
-
If your objective is to do the settings, not to
-measure, you can enter the Max UP and Down value separately to indicate to the
-App to display an alarm (Red color) when the max value is exceeded.
-
-
-
-
![]()
-
-
-
-
When the travel value exceed the max Value set, the
-corresponding line is going RED, but will continue to record the max value,
-even if it is above the limite. So you need to reset time to time to erase the
-max travel recorded and check your setting.
-
-
-
-
![]()
-
-
-
-
-
-
Hope you will enjoy this Bluetooth RC Throwmeter !
-We will probably release new version in the futur,
-but be patient.
-
-
-
-
+
+
![]()
+
+
Make your own BlueTooth RC Throwmeter
+
+
by Yannick Selles, Pierre
+Rondel, Vitaliy Ryumshyn
+
+
+
+
Introduction
+
+
This mobile application allows you to
+"build" your own Bluetooth throw-meter for a very reasonable cost. It
+doesn't require any soldering or cabling. You just need to have access to a 3D
+printer and that is all!
+
+
+
+
What is new in this version?
+
+
+
+
á
+Support to sensors
+simultaneously
+
+
á
+More stable Bluetooth
+connection, and reconnection when exiting of standby/sleeping mode
+
+
á
+Clearer separation
+between max travel feature and limit setting with alarm feature
+
+
á
+Localization
+
+
+
+
The component
+
+
![]()
+
+
The component is the BWT61CL from Wit Motion, a six
+axis Bluetooth attitude angle sensor with battery incorporated. You can buy it
+on AliExpress or Amazon US and amazon EU and cost
+around 20~25 Euros, free shipping.
+
+
+
+
It is based on the JY61 sensor, has Bluetooth or
+serial connectivity, integrates a dynamic Kalman filter algorithm, an internal
+voltage stabilizing circuit module, voltage 3.3v~5v. The only drawback it has
+is that the Bluetooth BLE is only compatible with android. The battery has a
+150mA capacity so last for a long operation time.
+
+
Characteristics
+
+
+ - Voltage: 3.3V-5V
+ - Current: <40mA
+ - Size : 51.3mm x 36mm X 15mm
+ - Weight : 16gr
+ - Dimension: Accelerated speed -3d
+ Angular speed -3d Magnetic field-3d Angle-3d
+ - Air pressure 1d
+ - Range : Accelerated speed -±16g
+ Angular speed -±2000¡/s Angle---±180¡
+ - Stability: Accelerated speed -0.01g
+ Angular speed -0.05¡/s
+ - Attitude measurement
+ stability: 0.05¡
+ - Output content: Time, Accelerated
+ speed, Angular speed, Angel.
+ - Output frequency：100Hz
+ - Date interface: Serial TTL level
+ Bate rate--115200(default and cant be changed)
+ - Bluetooth transmission distance
+ : >10m
+ - Support for
+ Android
+ - Working time: 2 to 3 hours (full
+ charge)
+
+
+
Documentation
+
+
http://wiki.wit-motion.com/english/lib/exe/fetch.php?media=bluetooth_inclinometer:bwt61cl:docs:bwt61cl_user_manual_v1.pdf
+
+
+
+
Building your RC
+Throw-meter
+
+
As I said in introduction, the work is limited to the
+3D printing of the clips that allow to fix the device on the trailing edge of
+the glider. It has been designed on DesignSpark (original
+file .rsdoc), and I'm providing the .rsdoc original file in addition to the STL file.
+
+
+
+
STL file is here
+
+
![]()
+
+
The clips is removable so the device, its clips and
+the charging cable can be carried/stored in the plastic box it was received in.
+
+
+
+
Just print the part, in PLA or PETG or ABS, 100% in
+fill for me. The dimension is optimised for F3x plane wings and tailplanes. To
+protect the surface of the control surface and avoid the clips to slide/shift,
+I added a piece of rubber (a small piece of bicycle inner tube) on the clips
+surfaces, with double side tape.
+
+
+
+
![]()
+
+
+
+
+
+
Print the sticker using the .pdf provided. Prior to
+apply it, don't forget to remove the other stiker. Protect the printed
+paper with transparent tape at the top, and double side tape on the other side,
+and position it on the top of the case, respecting the correct orientation
+(Charge, On/Off). This will give you the orientation when using pointing where
+is the hinge
+
+
+
+
The App
+
+
The Android App has been developped
+by Yannick and Vitaliy. The App is divided in several
+screens, the start screen giving access to the top left menu, the "Sensor
+BT" screen to bind the App with the throwmeter, and finally the
+"Throw Meter" screen where everything happens once binded.
+
+
+
+
Using your RC
+Throw-meter(s)
+
+
Charging the
+battery
+
+
Connect the cable provided to the balancer Plug. The
+red led is ON during the charge and switch off once charged
+
+
+
+
Switching on your Throwmeter(s)
+
+
Move the sliding switch from right to left. The blue
+led is blinking which indicates that the device is waiting for the binding.
+
+
+
+
Binding your
+Android smartphone for the first time
+
+
On in the parameter/bluetooth menu and scan for new
+device. The BWT61CL will show as HC-06. When asked, enter the code 1234. The sensor
+is now binded, you can open the App.
+
+
+
+
Binding with the
+App
+
+
Select the menu on
+the top left, then open "Sensor BT" and select one (or two) HC-06 sensors
+or click on SCAN if the device doesn't appear. Once selected you can return on
+the start page, Open the menu on the top left and select "Throw
+meter"
+
+
+
+
![]()
+
+
+
+
Very first
+calibration
+
+
+
+
If the device is providing inconsistent or weird measures, it probably
+needs a full calibration using the manufacturer App you can download here. To do so, once selected the correct
+chipset model WT601, click on SET (top left) and then "Acceleration
+calibration".
+
+
![]()
+![]()
+
+
+
+
You can now leave this
+App and start the RC Throw-meter Application.
+
+
+
+
Reset Angle
+
+
The device is
+supposed to do a calibration at startup. It is recommended to do it with the
+device installed on a horizontal surface. Once done, you can clip the
+device on the leading edge of control surface you want to measure. When
+your control surface is at its neutral position, proceed to a new
+"Reset Angle" in order for the device to know its spacial position
+and be ready to measure the angle.
+
+
+
+
Travel setup
+
+
Measure the chord
+of you control surface and click on the chord field at the top of the screen to
+enter the value. There is no unit so it can be mm or inches. Travel will be
+shown in the same unit.
+
+
+
+
![]()
+
+
Max UP and Max
+DOWN
+
+
This is a very useful feature that allows you to
+quickly measure the Max UP and DOWN travels of a control surface.
+
+
+
+
![]()
+
+
+
+
SET Max UP and Max
+DOWN
+
+
If your objective is to do the settings, not to
+measure, you can enter the Max UP and Down values separately to indicate to the
+App to display an alarm (Red color) when the max value is exceeded.
+
+
+
+
![]()
+
+
+
+
When the travel value exceed the max Value set, the corresponding
+line is going RED, but will continue to record the max value, even if it is
+above the limite. So you need to reset time to time to erase the max travel
+recorded and check your setting.
+
+
+
+
![]()
+
+
+
+
+
+
Hope you will enjoy this Bluetooth RC Throw-meter and
+this new App version !
+
+
+
+